Hydraulic motor-valve.



A. L. GRANDSTAPF.

HYDRAULIC MOTOR VALVE.

APPLICATION EILED 0013, 1913.

Patented Dec. 1, 1914 3 SHEETS-SHEET 1.

WITNESSES 1+/Zw;/-

ATTORNEYS IHL' NORRIS PETERS 60.. PHOTOILITHOH WASHING TON. D. C.

A. L. GRANDSTAFP.

HYDRAULIC MOTOR VALVE.

APPLICATION IILEI) 00m, 1913.

1 1 1 9,274, Patented Dec. 1, 1914..

-3 SHEETS- 811231 2.

VI'IIIIIIIIIII WITNESSES M AITORIYEYS ALL. GRANDSTAPF. HYDRAULIC MOTOR VALVE. APPLICATION ILED 0012s, 1913.

Patented Dec. 1 1914;

3 SHEETSSHE BT 3.

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ALBERT L. GRANDS TAFF, OF STEUBENVILLE, OHIO.

HYDRAULIC MOTOR-VALVE.

Specification 01 Letters Patent.

Patented Dec. 1, 1914.

Application flied October 3. 1913. Serial No. 793,142.

To all whom it may concern:

lie it known that I, ALnsn'r L. GRAND- s'rarr, a citizen of the United States, and a resident of Steubenville, in the county of Jefferson and State of Ohio, have made certain new and useful Improvements in Hydraulic Motor-Valves, of which the following is a specification.

My present invention relates to hydraulic motor valves and more particularly to a hydraulic operating valve for fluid motors, presses, shears and other mechanism, my object being to provide an operating device 11'1- cluding a controlling or directing valve and a pressure valve together with certain connections whereby these valves may be moved in particular relation to one another to the end that many advantages, relating to both the construction and operation of such operating devices may result.

The preferred means by which I attain the above objects and the advantages to be hereinafter pointed out, are shown in the accompanying drawings in which,

Figure 1 is a vertical longitudinal section through one form of my invention. Fig. 2 is a plan view with the cover removed. Fig. 8 is a side elevation of a modified form. Fig. 4 is a vertical longitudinal section, with the operating lever removed. Fig. 5 is a central transverse section taken substantially on line 3-3 of Fig. 4, with the operatig. 6 is an enlarged levation of one side of the lever valve arms.

Referring now to the form shown in Figs. 3 to 0 inclusive, the controlling or directin valve C is arranged to slide on seats 1 an 2 within the valve casing A, and is provided with a port 6 adapted to register either of the outlet ports 3 and 5 with the central ex-' haust port 4, one of these outlet ports being open to the interior of easing A when the other is registered with exhaust port 4.

In practical use the valve casing A is mounted on an operating cylinder, its outlet ports 8 and l) communicating with cylinder intake ports upon opposite sides of the piston within the cylinder. Normally the valve C stands in an intermediate position as shown in Fig. 2 and it is also provided with a substantially central leak port 7 which, in this position communicates with the exhaust port 4 and permits all pressure v with the casing A to leak oii' so that upon gain starting the valve will move freely nd easily.

The stem G of the valve C leads outwardly through one end of the casing A and from the opposite end thereof leads the stem E of the pressure valve D, this latter valve being normally seated, by the pressure thereon, against a seat 8 located between the main )ortion of valve casing A wherein valve C slides and the fluid inlet 13 of the casing. The valve stems G and E are provided at their outer ends with adjustable crossheads (.i' and F/ to the ends of which are connected the outer ends of inwardly projecting valve arms 16 and 15 extending along each side. of the valve casing A with their inner enlarged ends overlapping in spaced relation, arms 16 of the valve 0 being outermost.

Extending between the overlapped ends of valve arms 15 and 16 at opposite sides of the casing are the enlarged ends of a'U- shaped lever 10 having a central handle 10, these lever ends being centrally pivoted on studs 10" projecting from the casing sides through end recesses of the valve arms 15. The studs 10 project beyond the lever ends and through segmental slots 16" of the valve arms 10, the lever ends having outwardly projecting studs 10 extending through other segmental slots 16" in the valve arms 16 which latter slots have central extensions in which studs 10 are normally disposed. The lever ends are also provided with inwardly projecting studs 10 at the sides of the pivot studs 10", and which are. adapted to engage the ends of valve arms is when the lever 10 is moved a sullicient distance in either direction. Thus with the valves 0 and D closed as shown-and the latter held on the seat by the pressure through the fluid inlet 18, the casing A is without pressure due tothc leak port 7. The lever 10 now being moved upwardly will cause the valve to move down by virtue of studs 10 in the extensions of slots 10. During this movement the inner ends of valve arms 16 are {gradually forced in a lateral direction unti stud 10 is disenga ed, at which time valve C will have comp eted its movement to uncover port 8 and register port 6 with the exhaust port 4. At substantially the time studs 10 are disengaged. studs 10 come into contact with the ends 0 valve arms 15 forcing the valve D to open and admit pressure. in this manner the motor piston is actuated in one direction by a single continuous'movement of lever 10 in one direction, the connections between the lever and the two valves being'such as that the controlling valve C completes its movement before the pressure'valve D is opened. The lever 10 now being released will, with the pressure on valve D, be returned to an intermediate position with this valve closed and valve C in mid-position.

In the form of my invention as shown in Figs. 1 and .2, the controlling valve C which controls ports 3, -l and 5 before mentioned, is .provided with a center notch a in which is oosely disposed the peripheral lug f of an operating disk F, this disk being mounted upon the inwardly projecting portion of a transverse shaft I'l journaled through the casing A and provided adjacent its outer end with an operating lever 71. seen in Fig. 2. The disk I" is also provided with a laterally projecting pin f.

The en arged bifurcated inner end 2' of the ressu re valve stem 1 straddles the shaft II a ong side one face of the disk F, and its outer end carries the pressure valve I, normally seated on the seat J between the controlling valve C' and the fluid inlet K, the valve seat J being formed upon the outer end of a ca e J projectin within the easing A an provided witi a plurality of surrounding apertures Thus when shaft H is rotate by means of its 0 crating lever h the controlling valve C wil be" moved in a direction depending upon the direction of such rotation and at the end of this movement it will be seen that the eripheral lug f of disk F will move out of t 1e valve notch c at substantially the same time the laterally projecting pins f of the disk comes into engagement with a portion of the inner end of valve stem I, moving the latter longitudinally a sufiicient distance to force valve I off its seat and provide for the entrance of operating fluid into the casing A.

In order to relieve the pressure within the casing A when the parts are in inoperative position as shown in Fig. 1, with the pressure valve closed I provide the pressure valve stem I with a longitudinal bore 11', at the inner end of which are apertures i communicating within the casin A so as to permit the pressure to leak o It is to be observed, however, that when this valve stem is moved lengthwise in order to open the pressure valve the apertures i are closed by means of the inner wall of the cage J.

It may be readily seen that with my improved hydraulic valve there is but one opening required'to be absolutely ti ht, as

against four and sometimes more 0 such important openings in the valves now in use. Furthermore the parts inside the valve casing are su 'ect to very little wear as the controlling valve is never under pressure during its movement, and while the parts on the outside are subject to the usual on)! a: thin patent may be obtained (or the coat: eaoh, by droning the Commlnioner of ratentu, Wellington, 10."

wear, repiair of these parts may be quickly made. y improved valve is furthermore Sll%e, compact and easy to operate.

ile the advantages I attain may be accomplished by various structures modified with respect to the preferred forms I have shown, it is evident that the rinciples will remain the same, and I there ore reserve all such modifications as fall within the scope and terms of the appended claims.

I claim:

1. A device of the character described, comprising a casin having a plurality of outlet ports and a uid intake port, a valve controllin the outlet ports, a pressure controlled va ve between the said controlling valve and the intake port and normally held in closed position. a lever having connection with the controlling valve for moving the same, and connections whereby to open the pressure when the controlling valve reaches the end of its stroke.

2. A device of the character described comprising a casin having a plurality of outlet ports and a uid intake port, a valve controlling the outlet ports, a second valve normally seated to control the admission of fluid from the intake port, and an o erating lever having connections for actuating first one and then the other of said valves 111 the order named.

3. A device of the character described, comprising a casin having a plurality of outlet ports and a uid intake port, a valve slidable in the casing to control the outlet ports, a pressure valve normally seated between the controlling valve and the intake port, and an operating lever having connection with both of said valves.

4. A device of the character described comprising a casin having a plurality of outlet ports and a uid intake port, slidable in the casing to control the outle ports and having a leak port whereby to relieve pressure within the casin when the outlet ports are covered, a second valve normally seated between the controlling valve and the intake port, and means for operating the valves.

5. In a device of the character described, the combination with a cylinder having inlet and exhaust ports, of a valve casing having a fluid inlet, a valve in the casing controllin the cylinder ports, a pressure valve controlling the fluid inlet, and means for moving the controlling valve, having connection with the ressure valve for o )enin the latter when tlie former reaches t e end of its stroke.

ALBERT L. GRANDSTAFF.

Witnesses:

Jos. W. HUTTON, Tnos. S. Jones. 

